Altkönig"In the La Tène period around 400 BC, the Celts settled the Altkönig. They built Heidetrank Oppidum, several ringwalls around the summit which are still evident. It is unknown when and why they abandoned the Altkönig. Coordinates: 50°13′N 8°29′E / 50.217°N 8.483°E / 50.217; 8.483" - (en.wikipedia.org 27.12.2019) Hochtaunuskreis